DIspose添加

TestingModule/ViewModels/SingleStepEditViewModel.cs

@@ -18,7 +18,7 @@ using UIShare.GlobalVariable;
 
 namespace TestingModule.ViewModels
 {
-    public class SingleStepEditViewModel:NavigateViewModelBase
+    public class SingleStepEditViewModel:NavigateViewModelBase,IDisposable
     {
         #region 属性
         private Guid _ID;
@@ -196,6 +196,26 @@ namespace TestingModule.ViewModels
             SelectedStep = new StepVM(_ScopedContext.SelectedStep);
         }
         #endregion
+        public void Dispose()
+        {
+            try
+            {
+                // 1. 【核心修复】必须严格退订所有全局 Prism 事件
+                _eventAggregator?.GetEvent<EditSetpEvent>()?.Unsubscribe(EditSingleStep);
+                _eventAggregator?.GetEvent<DeletedStepEvent>()?.Unsubscribe(DisposeSelectedStep);
+                _eventAggregator?.GetEvent<ParamsChangedEvent>()?.Unsubscribe(ParamsChanged);
+
+                // 2. 清空当前正在编辑的步骤副本，断开前台绑定，防止 UI 视图树悬挂
+                SelectedStep = null!;
+
+                // 3. 断开对工位隔离上下文的强引用
+                _ScopedContext = null!;
+            }
+            catch (Exception ex)
+            {
+                LoggerHelper.Error($"释放单步编辑组件（SingleStepEditViewModel）资源失败: {ex.Message}");
+            }
+        }
 
     }
 }